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db_include/access/twophase.h

@@ -0,0 +1,63 @@
+/*-------------------------------------------------------------------------
+ *
+ * twophase.h
+ *	  Two-phase-commit related declarations.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/access/twophase.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef TWOPHASE_H
+#define TWOPHASE_H
+
+#include "access/xact.h"
+#include "access/xlogdefs.h"
+#include "datatype/timestamp.h"
+#include "storage/lock.h"
+
+/*
+ * GlobalTransactionData is defined in twophase.c; other places have no
+ * business knowing the internal definition.
+ */
+typedef struct GlobalTransactionData *GlobalTransaction;
+
+/* GUC variable */
+extern PGDLLIMPORT int max_prepared_xacts;
+
+extern Size TwoPhaseShmemSize(void);
+extern void TwoPhaseShmemInit(void);
+
+extern void AtAbort_Twophase(void);
+extern void PostPrepare_Twophase(void);
+
+extern TransactionId TwoPhaseGetXidByVirtualXID(VirtualTransactionId vxid,
+												bool *have_more);
+extern PGPROC *TwoPhaseGetDummyProc(TransactionId xid, bool lock_held);
+extern BackendId TwoPhaseGetDummyBackendId(TransactionId xid, bool lock_held);
+
+extern GlobalTransaction MarkAsPreparing(TransactionId xid, const char *gid,
+										 TimestampTz prepared_at,
+										 Oid owner, Oid databaseid);
+
+extern void StartPrepare(GlobalTransaction gxact);
+extern void EndPrepare(GlobalTransaction gxact);
+extern bool StandbyTransactionIdIsPrepared(TransactionId xid);
+
+extern TransactionId PrescanPreparedTransactions(TransactionId **xids_p,
+												 int *nxids_p);
+extern void StandbyRecoverPreparedTransactions(void);
+extern void RecoverPreparedTransactions(void);
+
+extern void CheckPointTwoPhase(XLogRecPtr redo_horizon);
+
+extern void FinishPreparedTransaction(const char *gid, bool isCommit);
+
+extern void PrepareRedoAdd(char *buf, XLogRecPtr start_lsn,
+						   XLogRecPtr end_lsn, RepOriginId origin_id);
+extern void PrepareRedoRemove(TransactionId xid, bool giveWarning);
+extern void restoreTwoPhaseData(void);
+#endif							/* TWOPHASE_H */